Improvement in ice-plows



ID. B. GERRY;

:CE-PLOW. Nn.176,619`; Patented April z5i 187s.

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ILPEI'ERS, PHQTO L|THDGRAFHER, WASHINGTON. D C.

tion, reference being had to the accompanyingV N'I'IED STATES DAVID B. GERRY, or cHIoAeo, ILLINOIS, AssI'eNoR To ANsoN s. PIPER,

0E SAME PLAGE.

IMPROVEMENT-` IN ICE-FLOWS.

Specification forming part of Letters Patent No. 176,6l9, dated April 25, 1876 application tiled November 16, 1875.

To all whom 'it may concern Be it known that I, DAVID B. GERRY, ot

Chicago, Cook county, State of Illinois, have invented new anduseful Improvements in Ice- Plows, ot' which the following is a full descripdrawings, in which- Eigurel is an elevation Fig. 2, a top view; Fig. 3, an enlarged detail, showing one tooth in section.

As the teeth of ice-plows have been heretofore made, it is necessary', when a tooth is broken in use, to out or grind ott' all the teeth to bring them again to a common line. rIhe `object of this invention is chiefly to ob'viate this difticulty, which I accomplish by making the teeth in two parts, one of which can be easily removed, and also adjusted as desired.

In the drawings, A represents the frame or back in which the teeth are secured. It can conveniently be made of two pieces between which the teeth can be placed, being secured as described, or in other suitable manner. B are the handles. a are bra-ces. The teeth are made in two partsone part is for cutting, and is made adjustable; the other part supports the cutter, and serves as a guide tolimit' the depth otl the cutting. b represents the cutting portion, and c the supporting portion, of'the tooth. The rear edge of bis provided with a tongue, and the front edge ot' c has a corresponding groove, as shown at c, Fig. 3, by means ot' which any lateral movementofl b is prevented.

I do not limit myself to'this exactdevice for preventingsuch" lateral movement. rIhe ob- -ject'may be accomplished. by properly securing the cutter at its upper end, or in any other known suitable manner.

rlhis cutter b, as shown, is held in place by means of a set-screw, t; but a bolt and nut might be used. It can be moved up and down in A, so that, as its point wears away, it can be adjusted; or if the point becomes broken it can be repointed, or a new cutter can be inserted,c remaining unchanged. This part c can be secured in A by means ot' bolts. front edge of the cutter has a flange, f, upon each side, to facilitate the operation of the device. In b these iianges do not extend to its upper end. d represents another cutter, the same in construction as b, except that the flanges f extend to the upper end thereof', and there it is provided with a cutting-point, l1., the same vas at the lower end, so that it' the lower end becomes dull, or is broken, the cutter can be reversed.` d is secured in A by means of a set-screw, t, or otherwise.

The cutters may be straight from top to bottom, as shown, or they may be curved. Between the several cutters there is a space, k, which may be wider atthe top than at bottom, it' desired. gis located in front ot' the forward cutter, to clear the path.

l have shown only twocutters in the drawings; but the frame or bars A maybe lengthened, and such number of cutters may be used as may be convenient. The space in the bars between the several cutters can be lilled with suitable blocks.

I havev not given the sizes ot the several parts, as any one at allfamiliar with ice-plows will be able to determine the sizes and proportions.

What I claim as new, and desire to secure by Letters Patent, is as follows:

In an ice-plow, an adjustable cutter, in combination with the Ixed part c and frame or back A, all constructed and operating substantially as and for the purposes set forth.

. DAVID B. GERRY. ,Witnesses Y E. A. WEST, 0. W. BOND.

The 

